Artificial tooth.



V UNITED STATES PATENT OFFICE.

GEORGE w. 'ronrr, or OMAHA, NEBRASKA.

an'rrrrcmr. roo'rn.

' Application filed July To all whom it may concern:

Be it known that I, Gnonon' Tom), a citizen of the United States, residing at Omaha, in the county'of Douglas and State of Nebraska, have invented certain new and' useful Improvements in Artificial Teeth, of which the following is a specification.

This invention relates; to improvements in artificial teeth, for use of dentists, and has for its principal object to provide teeth so constructed that they. may be used to advantage for crown or bridge work. The invention has especial reference toa means for securing together certain teeth scribed and claimed, and therefore no claimas described, for crown and bridge work, grooves being formed in the teethto .open

upon channels formed in their bases and, forming overhanging por-' tions. In applicants pending application,

incidentally,

Serial No. 627,309, the construction of the channel with the overhanging base, andgrooves opening upon the channel, is deis made thereto in the present application.

The invention consists of the 'novel constr uction, combination and arrangement of parts, as described and claimed, and asillustrated in the drawing, .wherein,-

Figure 1 is a side view, artly in section, of the artificial tooth. Fig. 2 is a transverse section of the tooth, taken on line 6-?) of Fig. 1. Fig. 3 is a view in longitudinal section, bein a section on the irregular line a a of Fig. 1. Fig. 4 is a side view of an open,'metallic frame employed as a holding means. Fig. 5 is a-top plan View of a side plate or filler strip, and Fig. 6 is a bottom plan view of the same. Fig.

7 is a 'front view of a part of a bridge formed by use of the artificial teeth. Fig. 8 is a view of an artificial tooth, in transverse section, this view being somewhat similar to that illustrated by Fig. 2, to show a modified form for the side recesses.

Referring nowto the drawing for a more particular description, numeral 10 1nd1- cates a body portion or tooth having a concaved channel 11 formed in its base between its front and rear faces to 0 en upon its sides, and at 12 are indicate grooves, re-

. of the tooth to open upon the concaved cesses or channels having a length less than that of the tooth, and formed in the sides channel 11. v

While recesses 12 are preferably formed to extend divergently from the base of the Specification of Letters latent.

'on, when the tooth is in use.

Patented Jan. 9, 1912. Serial No. 638,083.

tooth, as clearly shown in Fig. 3, said-recesses may have convergent side walls 14 of bevel shape. to provide tapered forms. At 15 are indicated perforations extending through the body of the tooth to open upon recesses 12.

At 16 (Fig. 4.) is indicated a metallic frame, consisting of the bars, plates or filler-strips 17, perforated transversely, as

indicated at 18, and the holding-pins '19. Strips 17 are adapted to be disposed in reces'ses 12 of the tooth, and being of tapered.

form and having side walls formed wedgeshapedin cross-section, they may fill recesses 12, substantially; and when so disposed, the outer walls of said strips will be flush- ;with the sides of the tooth, and the strips will beseated'in a manner to be pract-ically ob'scured' from view;

- The herein described tooth is particularly adapt-ed for use in bridge work. The broad bases of the tapbred, metallic-strips 17 opcrate to reinforce the tooth at or near its root end, where most needed, and they provide broad surfaces for connecting with the solder. [Any suitable metal may be used for the holding pins and strips'17, and for these parts platenoid and ankrite have jections 20 extending well. beyond the bottom' of the channel. This is desirable so that the base will have a curved depression corresponding to 'the'shape of the gum tissue, and may have a suitable bearing there- In operation. strips 17 are placed within recesses 12, and after the holding-pins have been inserted in recesses 15 and 18, they may project somewhat outwardly ofthe metallicstrips for bridge work, and solder 21 is used to fill the spaces adjacent to these pro-l jections and between the metallic strips of the adjacent teeth; and the solder provides an adequate holding means for securing the teeth ,tdgether. V

Fig. 8. illustrates the formation of recesses ioo 12 in the sides of the tooth 10, the recesses .having'convergent side walls-14. The conwalls of the recesses; I may employ these angularly formed walls, as here illustrated, and the construction, while a modification, is not considered a departure from the invention.

Having fully explained the several parts andtheir uses, a further description relating to operation is not necessary.

What -I claim as my mvention, and desire to secure by Letters Patent is,- I

1. An artificial tooth, comprising an apertured body portion formed at its basewith a concaved channel between its front and rear faces to openupon its sides, and having grooves formed in its sides opening upon said concaved channel and said aperture; apertured filler-strips adapted 'to be seated in said grooves; and'a holding-pin adapted to traverse the apertures of said body portion and said filler-strips.

2. In combination with a tooth having a perforated part and formed with a channel opening upon its bottom and two of its sides,

a metallic frame adapted to engage within the perforated part and to fill the channels at the sides of t e tooth.

3. An artificial tooth, comprising a body portion formed with transverse apertures and a concaved channel in its base betweenits front and rear faces to open upon its sides, and-having grooves formed in its sides to open upon said apertures and extending 'convergently from and opening upon said concaved channel; apertured filler-strips adapted to be seated in said grooves, and

holding-pins adapted to be disposed in the apertures of said body portion and. the apertures of said filler-strips.

4. In combination with a tooth having a perforated part and formed with a channel openingupon its bottom and two of its sides, a metallic frame ada ted to engage within the channels and per orated part and forming projections outwardly of said channels at the sides of the tooth.

In testimony whereof I have afiixed my signature in presence of two witnesses.

' GEORGE W. TODD. Witnesses:

HIRAM A. STURGns, Lona L. STURGES. 

